Replacement of Lateral Bracket Plate on the Junction Box [CFMB]

TASK 72-23-00-300-046-A
Replacement of Lateral Bracket Plate on the Junction Box

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
40	BRACKET PLATE	AIPC 72-00-00-05-061
40	BRACKET PLATE	AIPC 72-00-00-05-062

D. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
SPM 702118160003
SPM 703221230010
SPM 704111350009
SPM 704311390003
SPM 704332390006
SPM 704450320006
ESM 722321300013
Replacement of Lateral Bracket Plate
Location of the Riveted Holes
Dimension Information of Position

3. Job Set-up
Subtask 72-23-00-941-106-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) in position to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 72-23-00-010-133-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 72-23-00-040-077-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 72-23-00-010-135-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 72-23-00-390-051-A ** ON A/C NOT FOR ALL

A. Removal of the Damaged Bracket Plate
(1) Alternative Configuration Available - Welded bracket plate

WARNING: USE PERSONAL PROTECTION EQUIPMENT. METAL PARTICLES CAN CAUSE DAMAGE, INJURY OR IRRITATION.

(a) Drill to remove the spot weld from bracket plate SPM 704450320006.
(2) Alternative Configuration Available - Riveted bracket plate

WARNING: USE PERSONAL PROTECTION EQUIPMENT. METAL PARTICLES CAN CAUSE DAMAGE, INJURY OR IRRITATION.

(a) Drill to remove rivets from the riveted bracket plate SPM 704332390006.
(3) Do a visual inspection of the junction box. If indications, remove the junction box and apply ESM 722321300013.
(4) Remove the riveted nuts (20) from the bracket plate you remove.

WARNING: USE PERSONAL PROTECTION EQUIPMENT. METAL PARTICLES CAN CAUSE DAMAGE, INJURY OR IRRITATION.

(a) Drill to remove the rivets (10) which attach the riveted nuts (20) SPM 704311390003.

NOTE: Be careful not to damage the riveted nut. If the riveted nut is damaged, install a new one.

Subtask 72-23-00-420-073-A ** ON A/C NOT FOR ALL

B. Installation of the New Bracket Plate
(1) Install the riveted nut (20) on the new bracket plate.
(a) Do a visual inspection of the rivet holes in the tube bundle junction box SPM 704311390003.

Location of the Riveted Holes ** ON A/C NOT FOR ALL

(b) Drill the rivet holes and the riveted nut.

WARNING: USE PERSONAL PROTECTION EQUIPMENT. METAL PARTICLES CAN CAUSE DAMAGE, INJURY OR IRRITATION.

1 If necessary, drill again at the same time the rivet holes in the junction box and in the riveted nut you are to rivet SPM 704311390003.

Location of the Riveted Holes ** ON A/C NOT FOR ALL

NOTE: Make sure that the rivet head does not come out of its recess. If necessary, grind it smooth with the surface.

(2) Put the new AIPC 72-00-00-05-061 BRACKET PLATE (40) in position on the junction box.

Location of the Riveted Holes ** ON A/C NOT FOR ALL

and

Dimension Information of Position ** ON A/C NOT FOR ALL

(3) Drill the rivet holes and the riveted nut.

WARNING: USE PERSONAL PROTECTION EQUIPMENT. METAL PARTICLES CAN CAUSE DAMAGE, INJURY OR IRRITATION.

(a) Drill at the same time the rivet holes in the junction box and in the bracket plate (40) SPM 704332390006.

Location of the Riveted Holes ** ON A/C NOT FOR ALL

(4) Do a fluorescent inspection of the holes SPM 703221230010. If indications, remove the junction box and apply ESM 722321300013.
(5) Do a hand blending of the contact areas SPM 704111350009.
(6) Remove the grease from the junction box contact area and the bracket plate SPM 702118160003.
(7) Put the new AIPC 72-00-00-05-062 BRACKET PLATE (40) in position and rivet it with six rivets (30) SPM 704332390006.

5. Close-up
Subtask 72-23-00-410-127-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser doors (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 72-23-00-440-070-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 72-23-00-410-126-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:42:05 UTC